Dowel-wedging machine



C. E. EVANS.

DOWEL WEDGING MACHINE. APPLICATION FILED MAY25. l9l5.

1,31 7, 1 59. Patented Sept. 30, 1919.

3 SHEETS-SHEET l.

C. E. EVANS.

DOWEL WEDGING MACHINE.

APPLICATION FILED MAY 25, I915. 1,317, 159. Patented Sept. 30, 1919.

3 SHEETSSHEET 2- C. E. EV'ANS.

DOWEL-WEDGING MACHINE.

APPLICATION FILED mAYzs. m5.

1,317,159. PatentedSept. 30; 1919.

3 SHEETSSHEET 3.

CHARLES E. EVA-N S, OF WEED, CALIFORNIA.

DG'WEIJ-WEDGING- MACHINE.

Specification of Letters Patent.

PatentedSept.30, 1919.

ap lication filed May 25, 1915. serial No. 30,316.

To all whom it may concern:

Be it known that 1, CHARLES E. EVANS, a citizen of the United States, residing at Weed, Siskiyou county, State of California, have invented certain new and useful Improvements in Dowel-Wedging Machines, of which the following is a specification.

This invention relates to wood working machinery and more particularly to machines for cutting slits in the endsof dowels, one end of which has been driven into a door rail or other piece of wood.

It is the object of the invention to provide a machine which will be capable of automatically cutting the slits in the dowels so as to form wedges at the ends of the dowel in accordance with the principles of my Patent No. 1,060,543, dated April 29, 1913. One embodiment of the invention is illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of the machine;

Fig. 2 is an end elevation thereof;

Fig. 3 is a plan View; and

Fig. 4' is a side view of a door rail with the dowels therein, the dowels being shown as provided with the slits which are cut by the machine illustrated in Figs. 1 to 3.

Referring to the drawings, indicates a suitable frame which carries a drive shaft 11, this shaft being provided with a pulley Wheel 12 or other suitable means by which it may be operated by power. The frame also supports a shaft 13 on which there is a pinion 14 and a belt wheel 15, the pinion and belt wheel being rigidly secured together. A pulley 16 is secured on the shaft 11 and drives the pulley by means of a belt 17. An idler pulley 18 carried by a slide bar 19 engages the belt 17 so as to permit the belt to be tightened on the pulleys 15 and 16 when it is desired to transmit power from the shaft 11 to the pulley 15. The bar 19 is mounted in suitable guides 20 and 21 and is provided with notches 22 which are adapted to engage a pin 23 on the frame 10 so as to hold the bar in any position to which it is adjusted. The bar is also provided with a handle 24 by means of which it may be readily adjusted.

The inion 1 4 meshes with a gear 25' on the sha t 26. The shaft 26 carries sprockets 27 and 28 over which pass the endless chain carriers 29 and 30. The shaft 26 is mounted in suitable bearings 31 and at the opposite end of the machine the carriers 29 and pass over sprockets 3'2 and 33, respectively, which are rotatably supported on adjustable brackets 34. Referring to Fig. 1, the manher of adjustment of the brackets 34 will be evident. In this drawing there is illustrated an adjusting screw 35 which has threaded engagement with a lug 36 on the under side of the table 37 and has its end in engagement with the bracket 34. A bolt 38 is provided for the purpose of securing the bracket to the table 37 and when this bolt is loosened the bracket may be adjusted by means of the screw 35 to vary the slackncss of the carriers 29 and 30. The table 37 is made adjustable on the frame 10 by providing a dove-tail 39 on the frame which is engaged by corresponding parts on the table 37,- as shown in Fig. 1.

The frame 10 carries a rotatable shaft 40 having a hand wheel 41 thereon and a threaded ortion 42 which engages a lug 43 on the un er side of the table 37. The shaft 40, being restrained against axial movement, causes the table 37 to be moved on the dovetail 39, when the shaft is rotated.

The table 37 carries upright brackets 44 and 45, to which are secured the bearing brackets 46 and 47, respectively. The bracket 46 carries a shaft 48 and this shaft carries at its lower end a circular saw 49 and at its upper end a pulley 50. The bracket 47 carries a shaft 51 and this shaft carries at its lower end a circular saw 52 and at its upper end a pulley 53. As seen from Figs. 2 and 3, the shafts 48 and 51 are oppositely inclined with reference to a horizontal plane so that the saws 49 and 52 are arranged in angular relation to each other.

In order to adjust the position of the saws 49 and 52 horizontally, the brackets 44 and are slida-ble transversely of the machine on the table 37 and may be adjusted by means of the bolts 54. In order to adjust the saws 49 and 52 vertically the brackets 46 and 47 are made adjustable on the brackets from the latter over the pulley 57 to the pulley 61 and around the pulley 58. It will thusbe seen that the saws a9 and 52 are both driven from the pulley 58 by the belt 59. The

opposite side of the machine is provided with a table 63, which may be non-adjustable, and this table, carries the saws 64 and 65 which are mounted and operated from a pulley 66 on the shaft 11 in the same manner as the saws 4C9 and'52, so that a detail description of the manner of mounting and driving the saws 64 and 65 is unnecessary.

The pulley 62 is carried by a frame 67 and this frame is supported by the brackets 68 on the table 37. The brackets 68 are provided with vertically extending slots 69 which permit the frame 67 to be adjusted vertically thereon and clamped in any desired position by means of the bolts 7 0.- The pulley 62 is thus adapted to take up any slackness in'the belt 59.

An upright bracket 71 is secured on the table 37 and cotiperates with a similar bracket 72 on the table 63 to form a maga zine for the pieces of work which are to be fed through the machine. The lower parts of the brackets 71 and 72 are inclined as shown at 73 and have arranged opposite thereto brackets 74 which engage the dowel pins projecting from the ends of the pieces and move the pieces forward, as clearly shown in Fig. 1. I

The carriers 29 and 30 are provided with lugs or attachments 75, spaced at intervals therealong and adapted to engage the articles and carry them forward from the magazine. As the articles pass the saws the latter cut slits in the dowels, as indicated at a in'Fig. 4. The attachments 75 engage the dowels and the ends of the rails or sticks 72 are between and guided by the inner edges of the tables 37 and 63. In order to hold the pieces of work in their proper position while the saws are acting. thereon, the pressers 7 6 are provided above the dowels and adapted to be engaged thereby. When the pieces reach the delivery end of the machine they are removed in any suitable manner as by means of the skids 77.

It will be evident from the foregoing that the details of the mechanism illustrated may be varied without departing from the spirit of the invention, as set forth in the appended claims.

Having thus described the invention, what is claimed and desired to be secured by Letters Patent is:

1. In a machine of the class described, in combination a hopper, a conveyer for taking Copies of this patent may be obtained for five cents each, by addressing the Commissioner Washington, D. 6.

articles from the hopper and carrying them through the machine, guide means of less height than the thickness of the articles fed 7 so that a portion of the article projects over ment laterally of the conveyer, and other guides having guiding surfaces parallel to the conveyer to hold the pieces against movement away from the conveyer, and one or more tools, disposed laterally outside said guides to operate on the pins of the pieces.

3. A machine of the class described including in combination, means to hold and feed pieces of work having fiat ends and a pin projecting from at least one'end,means to carry said piecesthrough the machine, guiding means having surfaces perpendicular to the path of movement of the pieces adapted to engage the flat ends of the pieces and guide them as they are carried-through the machine, and one or. more tools disposed laterally outside said guiding means to operate on the pins ofthe pieces. 7

4:. A machine of the class described including in combination, means to hold and feed pieces of work having fiat ends and a pin projecting from at least one end, means to carry said pieces through the machine, guiding means having surfaces perpendicular to the path of movement of the pieces adapted to engage the fiat ends of the pieces and guide them as they are carried through the machine, pressers disposed laterally 0utside said surfaces to engage the pins of the pieces and hold them against movement away from the conveyer, and one or more tools disposed laterally outside said guiding means to operate on the pins of the pieces. 5. A machine of the class described .including in combination, means to hold and feed pieces of work having fiat ends and a pin projecting from at least one end, .a conveyer to carry the pieces through the machine, guiding means to hold the pieces against displacement in a direction parallel to the conveyer and also in a direction perpendicular thereto, and one or more tools disposed laterally of said guiding means to operate on the pins of the pieces. In testimony whereof I aflix my signature.

CHARLES E. EVANS.

of Patents, 

